On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Can you start the fire using two pieces of wood?

Find the missing letter in the last circle logically in the given below picture.

How many triangles are there on the puzzle below?

Look at the picture and find out which square is not linked with any of the other squares.

The more of this there is, the less you see. What is it?

I travel all around the world but always stay in the corner. What am I?

What kind of tree can you carry in your hand?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?